Rokuro Enmado was once a promising exorcist, but a tragedy that killed his friends made him swear off the work entirely. His resolve cracks when Benio Adashino, a driven young exorcist, moves to Tokyo and throws herself at the Kegare, the impurities that spill out of the realm of Magano. The two clash on sight, then learn they have been named the Twin Star Exorcists, fated to marry and bring about the prophesied Miko who could end a war a thousand years old.